LNBH24_0808 STMICROELECTRONICS [STMicroelectronics], LNBH24_0808 Datasheet
LNBH24_0808
Related parts for LNBH24_0808
LNBH24_0808 Summary of contents
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Dual LNB supply and control IC with step-up and I²C interface Features ■ Complete interface between LNBS and I²C bus ■ Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93%@0.5 A) ■ Selectable output current ...
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Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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System register (SR, 1 Byte for each section A and 7.3 Transmitted data (I²C bus write mode) for each section A ...
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Block diagram Figure 1. Block diagram TTX- A TTX ISEL - A ISEL - Rsense Rsense EN- EN VSEL- VSEL- P-GND- ...
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Introduction The LNBH24 includes two completely independent sections. Except for the V inputs, each circuit can be separately controlled and have independent external components. The specification that follow should be considered equally for both sections (A/B). 2.1 Application information ...
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DSQIN pin or the TEN I²C bit. The DSQIN internal circuit activates the 22 kHz tone on the V presence on the DSQIN pin, and it stops with 1 cycle ± 25 µs delay after ...
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The LNBH24 is also compliant with the USA LNB power supply standards. In order to allow fast transition of the output voltage from and vice-versa, the LNBH24 is provided with the VCTRL TTL pin which ...
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OUT function is used to force the V soon as the minimum current test phase is expired, so that the V controlled again as per the VSEL/LLC bits status. In order to avoid false triggering, ...
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Pin configuration Figure 3. Pin connections DSQOUT-B DSQOUT-B DSQOUT-A DSQOUT-A Table 2. Pin description Pin n° Symbol (sec. A/ CC– 11 LX Step-Up voltage ...
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Table 2. Pin description (continued) Pin n° Symbol (sec. A/B) 18 TTX-A 2 TTX-B 17 DETIN-A Tone decoders 3 DETIN-B 15 DSQOUT- A DiSEqC outputs 5 DSQOUT EXTM-A 36 EXTM-B 10 P-GND-A Power grounds 9 P-GND-B ePad ePad ...
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Maximum ratings Table 3. Absolute maximum ratings Symbol power supply input voltage pins CC input voltage UP I Output current output pin voltage oRX V Tone output pin voltage ...
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Application circuit Figure 4. Typical application circuit C4a C4a C3a C3a C5b C5b C6b C6b L2a L2a 470nF 470nF 100µF 100µF 100µF 100µF 470nF 470nF Ferrite Ferrite Bead Bead D1a D1a STPS130A STPS130A L1a L1a 22µH 22µH Rsel-A Rsel-A ...
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Table 5. Bill of material (valid for A and B sections except for C1, C2, C7, C8 and R1) Component R1, R4 1/4 W resistors. Refer to the typical application circuit for the relative values R3, R 1/8 W resistors. ...
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I²C bus interface Data transmission from main MCU to the LNBH24 and vice-versa takes place through the 2 2 wires I C bus Interface, consisting of the 2 SDA and SCL lines (pull-up resistors to positive supply voltage must ...
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Figure 5. Data validity on the I²C bus Figure 6. Timing diagram of I²C bus Figure 7. Acknowledge on the I²C bus 15/30 ...
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LNBH24 software description 2 The LNBH24 I C interface controls both the IC sections A and B depending on the address sent before the DATA byte. The description below is valid for both sections. 7.1 Interface protocol The interface ...
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Table 6. Truth table PCL TTX TEN LLC VSEL ...
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Table 7. Register IMON VMON TMON LLC These bits are read exactly the same as they were left after last write operation 0/1 0/1 0/1 Note: Values are typical unless otherwise specified. 7.5 Power-ON I²C interface reset The I²C interface ...
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Electrical characteristics Table 8. Electrical characteristics of sections A/B (refer to the typical application circuit in Figure 4, T from °C, EN=1, VSEL=LLC=TEN=PCL=ITEST=TTX=AUX= kΩ, DSQIN=LOW, V referred ° ...
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Table 8. Electrical characteristics of sections A/B (continued) (refer to the typical application circuit in Figure kΩ, DSQIN=LOW, V SEL values are referred to T for I²C access to the system register) Symbol Parameter DC-DC ...
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Table 10. Address pins characteristics (T Symbol Parameter "0001000(R/W)" Address pin V ADDR-A1 voltage range for section A "0001001(RW)" Address pin V ADDR-A2 voltage range for section A "0001010(R/W)" Address pin V ADDR-B1 voltage range for section B "0001011(RW)" Address ...
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Table 13. 22KHz tone diagnostic (TMON bit) characteristics of sections A/B (refer to the typical application circuit in VSEL=LLC=TEN=PCL=ITEST=TTX=AUX=0, R mA, unless otherwise stated. Typical values are referred to T description section for I²C access to the system register) Symbol ...
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Typical performance characteristics (refer to the typical application circuit in VSEL=LLC=TEN=PCL=ITEST=TTX=AUX= mA, unless otherwise stated. Typical values are referred to T Figure 8. Output voltage vs temperature = ...
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Figure 14. Supply current vs temperature =No Load =No Load CC CC OUT OUT Both Sections Enabled with ...
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Figure 20. Tone frequency vs temperature OUT OUT EN=TEN=TTX=1 EN=TEN=TTX=1 ...
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Figure 26. DC-DC converter efficiency vs temperature 100 100 750 mA = 750 OUT OUT 50 50 EN=VSEL=LLC=1 ...
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Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...
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PowerSSO-36 mechanical data Dim. Min. A 2. 0.18 c 0.23 D 10. 4.1 Y 6.5 ...
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Revision history Table 14. Document revision history Date Revision 11-Feb-2008 1 27-Aug-2008 2 Changes Initial release. Modified mechanical data on page 28. 29/30 ...
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Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any ...